Grilled Salmon Caesar Salad

Name: Grilled Salmon Caesar Salad
Ingredients: 4 (6-ounce) skin-on salmon fillets, thawed if frozen; 1/2 cup plus 1 1/2 teaspoons olive oil, divided; 3/4 teaspoon kosher salt, divided; 1 teaspoon freshly ground black pepper, divided; 2 medium lemons; 4 ounces uncut sourdough bread (about 1/4 loaf); 4 medium romaine lettuce hearts (7 to 8 ounces each); 1 ounce Parmesan cheese (1/2 cup finely grated or 1/3 cup store-bought grated); 10 oil-packed anchovy fillets (about 1 ounce); 1 small clove garlic; 2 teaspoon Dijon mustard